After I managed to avoid storing the full scores in main memory, I am confident that the files in http://pkeus.de/~wb/mventi are worth a try for the public.

So far, I don't see much restrictions on use. The arena on-disk format is unchanged. 

I now see chances to further shorten the trienodes to 32 bytes.  So,  the server may be used for storage of about 100GB with 500MB available main memory.
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